Receiving-panel



G. B. @HOUSE AND l. H. MILLS.

RECEIVING PANEL. A-PFLICATION FILED MAR.10,19|9.

i GEORGE B. CBO'USE ISAAC H. MILLS, OF BROOKLYN, NEW YORK, ASSIGNORS T0THE SPEBRY GYROSCOPE Comm, 0F BROGKLYN, NEW YORK, CORPOBATIQNRECEIVING-PANEL.

Specication of Letters Patent.

Fatented Mar.t, limi..

Application led March l0, 1919. Serial No. 281,783.

To all 'whom t may concerns it known that we, GEORGE B. CRoUsE and lsAAcH. MILLS, citizens of the United States of America, residing at 493Washington Ave. and 51 Clark St., Brooklyn,

N. Y., res ectivel in the count of Kings- P YgY Y and State of New ork,have invented certain new and useful improvements in iteceiving-Panels,of which the following is a specication.

This invention relates to instrument panels. More specifically itrelates to receiver panels employed in radio telegraphy, or telephony.

it is well known in the radio art that electrical radiation, comprisingelectrostatic and electro-magnetic components originating in variouselectrical machines and apparatus, which may be in the vicinity of thereceiver, permeates the surroundings medium and sets up certain erraticdisturbing effects which interfere with the proper and intendedoperation of the receiver.

One of the purposes of this invention is effectively to shield theinstruments by combining a metallic screen with the panel or hoard uponwhich the instruments are mounted. The stray electrical radiation isthus prevented from passing through the panel and absorbed or reflectedbefore reaching the instruments.

Another object is so to combine the metallic screen with the panel as toform a mechanically sti and rigid structure.

-`With the above and other objects in view, the invention has relationto a certain construction and combination of parts, an eX- ample or'which is described in the following` specification, pointed out in theappended claims, and illustrated in the accompanying drawings, wherein;g

Figure l shows a conventional type instrument panel with its cover, theview being in vertical section.

Fig. 2 is an elevation View of a panel with a screen applied thereto,such as a copper plate secured to the surface of the panel.

Figs. 3, 1i, 5, and 6, illustrate di'erent methods of combining themetal screen or sheet with the panel.

Referrin now more in particular to the drawings, t e numeral ldesignates one form of instrument panel used in radio receiving. It isfurther pointed out that a device or panel constructed as here describedmightnd a use in X-ray work as a protector to the operator, byincorporating a lead plate therein and Vvusing' it as a shield. A frontand back metal cover 2 and 3 are employed to protect the instruments inuse from physical damage or wear and tear.,v When the radio set is inuse the front cover will necessarily have to be removed so that accessmay be had for adjustment and operation .of the instrument set. At thistime the instruments are subjectedto the disturbing effect of electricalradiation which may pass through the panel unless a metal shield isprovided. rlhe shield 4.- in connection with the metal cover 3 forms ametallic inclosure completely incasing the instruments againstelectrical radiation.

rlhis screen 4 is applied to either the front or rear surface of thepanel. ln Fig. 1 the screen is applied to the rear of the panel andadjacent the instruments. The instruments are shown mounted upon theback of the panel, and are iitted with the usual form of adjustingscrews and knobs which pass through the panel and are available foradjustment from the front side of the panel, as at 5 and 6. Theinstruments here shown represent a conventional set of radioinstruments, or telephony set, and as the instruments do not materiallybear on the subject of invention they are not described in detail butare pointed out in general by reference characters A., B and C, andbeing different instruments of the radio receiver set. The metallicsheet or plate 4 has punched therein all necessary holes and openingsfor receiving the parts and fittings which pass through the panel fromthe instruments to the adjusting means of the front. The sheet 4 issecured to the panels by embedding the struck up portions 7 in themolded material During the manufacture of the panel the plastic materialis shaped in molds and forms and during this process the struck upportions are pressed into the plastic material before itzhardens thussecuring the plate 4 firmly to the molded panel.

Fig. 3 and the remaining views illustrate various ways of combining themetal screen with the panel. The panel itself is usually moldedy of aselected insulating material such as bakelite dilecto, micarta and thelike. The metal sheet, perforated plate, or gauze materialmay bevcombined with the panel or plastic state into said mold or form.

When the material is hardenedv and removed from the form the metal sheetWill be e111- bedded in the panel and become an integral andstrengthening embodiment with the panel construction.'

Another method of combiningthe two materials is to form the projectionsor struck up portions on the screen or plate by punching u go4 tionsofthe metal, as indicated by 7 an These' projections may be turned outon both 'sides of the plate and then molded into the mass of materialand totally `incased therein as specifically shown in Fig.

3. In this Way the plate may be secured Within the panel. Angle members9 may be secured tothe screen and incase'd in the molded material,andlikewise the edges of the shield or screen may be turned up andbecome fixed in the mold of the panel as indieatedat 9 and 9 in Figs.tand Perforated or gauze screens 10 and 11 may also be employed toadvantage in a panel as shown 'in' Figs. 4 and 6.

A panel constructed as above disclosed forms an effect-ive shield andbarrier to all stray electromagnetic and electrostatic fields, and thusmay well be employed as a receiving anel in the art of radio telegraphy,telep ny or in other arts where the conditions are similar. Furthermorethe screens or Shields form an effective strengthening or reinforcingmeans for the panel imparting great rigidity and mechanical strengththereto. A4As explained above the metalli-- shield may b e securedeither Within or on either the front or back surface of the panel. Ifsecured on the rontit provides a Surfaire upon which legends or indiciamay be etched.'

Having described our invention what we desire to`claim and secure byLetters Patent is' l. instrument panel comprising in combination,a'planel of insulating material, and a metallic S. .est molded withinsaid material, for mounting radio instruments and for shielding saidinstruments from stray radiation, electromagnetic, and electrostaticshielding radio and telephony instrumentsV from stra Y electricalrad1ation.

3. Any instrument panel comprising in combination, a molded materialused as a base upon which radio or telephony inst-ru-V ments may beinstalled, a metallic gauze molded into the base, for the purposev offorming' a shield for protecting radio and telephony instruments fromstray elet-tri(` radiation.

4. A molded receiver panel for mounting radio and other delicateinstruments comprising in combination, a molded insulating material uponwhich the instruments may be installed, a gauze material, tongues formedon said gauze material and embedded within the insulating material, soas to secure the materials together for protection of the instrumentsfrom stray electrical radiation.

5.. A molded receiver panel for mountingr radio and telephonyinstruments comprising in combination, molded insulating material. ametallic screen,.tongues formed on said metallic screen and embeddedwithin the insulating material, so as to secure the metallic screen andinsulating material together for protecting the instruments from strayelectrical radiation.

6. A radio receiving device comprising in combination, a panel otinsulating material. and a metallic shield embedded therein.

7. In an electrical instrument panel, a sheet of metallic screen andinsulating material secured on both sides thereof.

In testimony whereof We have afiixed our signatures.

GEORGE B. CROUSE. ISAAC H. MILLS.

